<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    
</body>
</html>
<script>
    var a=Number(prompt("请输入年份"));
    if((a%4==0&&a%100!=0)||a%400==0){
        alert("闰年")
    }else{
        alert("不是闰年")
    }
    var b=Number(prompt("请输入三位数字"))
    var gw=b%10;
    var sw=parseInt(b/10%10)
    var bw=parseInt(b/100)
    if((gw*gw*gw)+(sw*sw*sw)+(bw*bw*bw)==b){
        alert("是水仙花数")
    }else{
        alert("不是水仙花数")
    }
</script>